Valve construction



Dec. 13, 1938. A. w. MOZIER VALVE CONSTRUCTION Filed Aug. 5, 1936INVENTOR. ALEEET VV/LZ/AMS More/ 5e ATTORNEY.

Patented Dec. 13, 1938 UNITED STATES VALVE CONSTRUCTION Albert WilliamsMozier, Plainfield,'N. J., assignor, by mesne assignments, to CarrierCorporation, Newark, N. J., a corporation of Delaware Application August5; 1936, Serial No. 94,353

2 Claims.

This invention relates to valves, and more particularly to valvesemployed in fluid compressors. In the past, considerable difliculty hasbeen experienced with compressor valves of the an- 5 nular ring typebecause of their tendency to be noisy in operation. While relativelyquiet operation may be obtained by using thin and flexible featherweightvalves, these valves are not very durable or reliable, and mustfrequently be replaced. From the standpoint of reliability andcontinuity of performance, it has been preferred to use relatively rigidand heavy valves, although they are noisier in operation than thefeatherweight valves. The general object of .the present invention is toprovide an improved valve construction in which relatively rigid-s andheavy valve rings may be employed, but which will be extremely quiet inoperation.

Another object of the invention is to provide a valve construction whichis efficient, as well as quiet in operation.

Another object of the invention is to provide a quiet valve which isrelatively simple and inexpensive to manufacture, and which is reliablein operation.

Another object of the invention is to provide an improved valveconstruction adapted to be employed in substantially the same form. forcontrolling the admission of gas to a compression cylinder or the like,and for controlling the discharge of gas therefrom.

It is another object of the invention to provide a method of regulatinggas flow whereby the operation of a check valve governing thedirectional flow'of the gas is rendered extremely quiet.

Other objects, advantages and features of the invention will be moreapparent from the following description of an illustrative form of theinvention, to be read in connection with the accompanying drawing, inwhich:

Fig. l is a fragmentary vertical section through a. reciprocatingcompressorembodying the invention;

Fig. 2 is a bottom view, in plan, of the discharge valve guide; and

Fig. 3 is 'a bottom 'view, in plan, of the suction valve guide.

Referring now to the drawing, Ill designates a compression cylinderwithin which a piston ll reciprocates. At the top of the cylinder I is adischarge valve plate I2 having formed therein a plurality of passagesl3, and an annular passage l3a, in communication. with the passages l3.Valve 14 is carried on valve seat I5 formed on the upper side of valveplate l2 in a manner which is well known in the art, and which,therefore, is deemed sufliciently disclosed by the drawing. The valve Hicomprises a fiat annular ring and may be formed of any desired material.In practice, the valve rings made of chrome vanadium steel have provenhighly satisfactory.

Mounted above valve plate I2 is valve guide member Hi, the centralportion of which is preferably recessed within the center of valve platel2, as shown at H, securely to center the guide It with respect to plate12.. Guide member i6 is held in position against valve plate [2 in anydesired manner, as, for example, by bolt i9 extending through thehousing of the cylinder and through gas discharge chamber I8. Formedwithin the guidemember 16 are a plurality of chambers 20 in which arepositioned springs 2i which act on valve l4 and tend to force the valveagainst its seat. Around the peripheryof member I6, and extendingdownwardly therefrom are formed a plurality of feet 22. These feet reston valve plate l2, as shown at 23.

Since these feet are spaced from each other and separate valve plate l2from member l6, the

spaces between the feet form gas passages 24 through which gas may fiowradially outwardly to discharge chamber I8 when the valve I4 is raisedfrom its seat. Partially to restrict passages 24, and to guide valve Itin its travel, ap-

plicant provides lips 25. extending downwardly from member l6 andextending arcuate ly between the feet 22. The distance through which thelips 25 extend downwardly from member l8 preferably approximates thethickness of valve ll. A slight clearance is provided between the valvel4 and the lips 25, and between the valve l4 and the feet 22.

. Member Hi is so formed as to provide, in combination with valve platel2, an annular chamber 26 into which gas passes from passage l3a whenvalve I4 is raised. A plurality of pas sages 21 are formed in and extendthrough member l6, providing communication between chamber 26 anddischarge chamber 18. It will be seen, therefore, that applicant hasprovided what may be termed a hooded valve, in which gas is notdischarged directly into a discharge passage, such as l8, but isdischarged into an intermediate passageway. I

The valve is designed to provide restriction of gas flow beyond the endof passage i3a. This restriction may be effected by controlling thenumber and/or dimensions of the passages through which gas passes afterit has passed through passage l3a, or by controlling the valve lift (1.e., the distance through which the valve travels).

The inlet or suction valve, formed at the top of piston II, and securedthereto by bolts 28, is substantially the same as the discharge valveconstruction just described. It may be observed,

however, that the springs 2la are preferably not,

as strong as the springs 2| of the discharge construction, and that thepassages 21a may, if desired, be somewhat shorter than the passages 21.

It is to be understood, or course, that the piston ll is-re'ciprocatedwithin the cylinder ill in any desired manner, as by a connecting rod,and that gas to be compressed is supplied to the cylinder l0 below thepiston through any suitable inlet passage or conduit. Compressed gas isdischarged from chamber l8 through conduit 28.

While the constructions described above and illustrated in theaccompanying drawing are well adapted to be usedin connection with the.compression of refrigerant vapor, it is to be understood that theinvention is riot limited to such use, but lends itselfto a wide varietyof applications.

Since manymodifications of the invention may be made without departingfrom the scope thereof it is to be understood that the foregoingdescription and accompanying drawing are to be regarded as illustrativeonly, applicant limiting himself only as indicated in the accompanyingclaims.

I claim:

1. In an apparatusot the'character described, a cover member, a valveguide member mounted adjacent said cover member, gas port means formedin said cover member, an annular disc valve adapted to control gas flowthrough said port means, spring means for urging said valve toward saidport means, a chamber formed between said cover member and said guidemember, the outside diameter of said chamber being approximately equalto the outside diameter of said valve, said chamber being adapted toreceive gas from said port means subsequent to the opening of saidvalve, and a plurality of passages for discharging gas delivered throughsaid port means upon opening of said valve, at least some of saidpassages being formed between said cover member and guide member andextending radially outwardly from said chamber, the total area of all ofsaid passages being less than the area for 'gas flow afiorded by maximumopening of said valve, whereby flow of gas delivered from said valve isrestricted.

2. In a fluid pumping mechanism, a cover member, a valve guide membermounted adjacent said cover member, gas port means formed in said covermember, an annular disc valve adapted to control gas flow through saidport means, said cover member and said guide member being formed andarranged to provide an.

annular chamber between said members and to provide a plurality ofpassages extending radially outwardly from said chamber, arcuate ridgemeans arranged in each of said passageways for restricting gas flow fromsaid chamber through said passageways subsequent to the opening of saiddisc valve, said arcuate ridge means being formed by portions of atleast one of said members, spring means for urging said disc valvetowards closed position and a plurality of passages formed through thebody. of said guide member for delivering gas from said annular chamber,the total free area for gas flow aflorded by said last-mentionedpassages and said radial passages being smaller than the area providedfor gas flow by maximum opening of said valve and serving to restrictthe flow of gas delivered from said valve.

ALBERT WILLIAMS MOZIER.

